他正要睡觉,电话铃响了 用英语怎么说 He ( ) ( ) ( ),when the telephone rang .
问题描述:
他正要睡觉,电话铃响了 用英语怎么说 He ( ) ( ) ( ),when the telephone rang .
答
He ( was ) (to ) (sleep ),when the telephone rang .
be to do表示正要,有将来的意思